Composition for fuses and process of making same.



WILHELM THE-CD93.

Specification of Letters Patent.

Patented Nov. 28, 1905..

Application filed October 2,1903. Serial No. 175,485.

To a. whom may concern.

Be it lmmvn that I, Fl' ZLHELM THEODOR UNs-E, a subject the Kin of Sweden and Norway, residing in Stocitholm, Sweden,

5 here invented. improved Slow-Combusties. fo position Fuses, ir llorpedoes, or the Lise, oi which the fohowihg is e specificction. 4

Slowly-burning compositions which generete gas on being ignited are used for many purposes. In safely-fuses, fuses for projectiles, cc, such a composition is used as the e ent effecting tl'ie ignition of bursting charge or the like after the lapse of a preclctermincsjl time. in rockets, like the composition is user] to provide prop l power. As a. liv ..ig agent such a composicion USGil in torches end the like. Such. compositions are genersliy mc11- ufsctured by pulrerizing and mixing certain materials, the mixture being then compressed, so as to render it coherent and cone pact to such a degree that a ter the composition. has been ignited the fire cannot penetrots into the moss, hit the combustion procoeds continuously from the ignited surface. Compositions mcnuiectureth in the above manner, however, have the property of de creasing in volume during storage, even if the pulver ecl materials of Wl'llCl'l the compo been completely dry. he letter contain any moisture, at greater shrinkof the nose during storage place.

Such ccmpositions'clso leek elasticity end are very brittle. They also are effected by damp, 5. from is i or lZlQl xpending ess than metal 2 1th increase of to t 2-.

when the co u Jslhc chamber time-fuses tor pro; ecof tho :lrom the oompos 311 when. th -per ture increases. these .2 .1

easons .ueolc he iolmeu he composition, so spreads n creel s plosicn the com- .ich a composition 1; of or the WllOlG oi the fuse may take "plosiou d by the fuse. Further,

such a composition being hygroscopic the rate of combustion will vary, depending on the conditions of storage.

The object of this invention is to obviate these defects. This is effected by importing to the particles of the composition an increased mobility among themselves by greasing them with o non-volatile oil, thus in-- creasing their elasticity and decreasing their hygroscopic properties. As a result, the particles after compression tend to move 'rom each other in consequence of their increased elasticity, so that the composition in case of being compressed in o chamber always tends to swell and keep the chamber iull. Instead of greasing the particles with e. non-volatile oil a. non-volatile grease or fat or some other non-volatile greasing material, or a mixture thereof, may be used, if desired.

The composition may consist of finely-divided common black gunpowder or the metcrials in rocket compositions, such as car bon, sulfur, and saltpeter. It is touncl that 7 5 a proportion 01" the greasing ingredient, which may he fine olive-oil, of 9.001 to 0.003 of the total weight of the composition has proved sulficie'ot for obtaining the result aimed ct; hut the proportion may very 10- 8o corcliug'to the circumstances.

The introduction 01" the greasing material into the composition may be effected in any suitable manner, either before or after the compression. Before the compression the S5 greasing steriol may, 102' instance, he mixed mechanical, with a small portion of the powder -ie composition, 21ml portion is then alterweril thoroughlyincorporated with the nmeihing portion. of the powder.

ftcr the compression the composition may iiun'icrsco in or enveloped. the greasing terisl and be left there until the necessary cot-ion 1 is takes lace.

'3'. claim my invehtioo-- v l. A slow-burning composition for fuses and the like, composed compressed. pul- 4 on mete isl, having its erorous comhir" tioles throughout. mess with a nonvolatile materiel m shout the zoo proportions set forth, whereby the combineiJlOTi rendered. uoeehriuhing, excansive, elastic, slid hy oscopic tendency is recluce l.

2. Thu herein-desoribed process of produc- In testimony whereof I have signefi my mg an elastlo, expanswe, and non-hygroname to thls speolfica lon 1n the presence of scoplo combusolon materlal for fuses or the two subscrlbln wltnesses.

like, consisting of incorporating with the WILH "LM THEODOR UNGE. loose use material a non-volatlle greasin Witnesses: material in about the proportions set fort A. HELJESTRAND,

and. than compressing the mass. S. SOMMAR. 

